Hoisting device for line poles



Jan. 3, 195() H. c. MoTT 2,493,687

'- HOISTING DEVICE FOR LINE POLES Original Filed Feb. 25, 1942 INVENTOR.

Patented Jan. 3, 1950 HOISTING DEVICE FOR LINE POLES Harvey C. Mott, Adairsville, Ga.

Substitute for abandoned application Serial No. 432,361, February 25, 1942. This application July 6, 1948, Serial No. 37,113

3 Claims.

This invention relates to hoisting devices, and its general object is to provide a device that is primarily designed for installing transformers on power line poles and the like, the device making it possible to hoist the transformer in close proximity to the top of the pole for installation accordingly, thus conserving space for crossarms and wires.

Afurther object is to provide a hoisting device that can be used for installing transformers on poles with or without crossarms, as the device can be attached directly .to the pole or to a crossarm, in an easy and expeditious manner, yet casual removal or displacement is practically impossible. Y

Another object is to provide a hoisting device by which a transformer can be raised and lowered in a manner to clear the pole, and the device is simple in construction, inexpensive to manufacture and extremely eilicient in operation, .use and service. v y

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawings and specically pointed out in the appended claims. Y

In describing the invention in detail, reference will be had to the accompanying'drawings wherein like characters denote like or corresponding par-ts throughout the several views, and in which:

Figure 1 is a side elevation of my device in its entirety attached directly to a pole.

Figure 2 is a top plan view of Figure l, with the hoisting rope removed.

Figure 3 is a sectional View taken approximately on the line 3 3 of Figure 1, looking in .the direction of the arrows.

Figure 4 is a side elevation, with the pole clamping structure removed from the pulley block, and with the latter attached to .the primary or upper crossarm.

Referring to the drawings in detail, the letter A indicates a power line pole or the like, and B the primary or upper crossarm.

My device includes an elongated rectangular relatively narrow pulley block that is made up of a pair of spaced parallel horizontally arranged side members I andv a base member 2 which is integral with the lower longitudinal edges of the side members, for disposal along the length thereof, the base member being of less length than that of the side members and the ends thereof terminate an equal distance inwardly of the ends of the side members to provide pulley receiving spaces at the ends of the block, as shown in Figure 2. Fixed to and bridging the side members adjacent to the ends thereof are shafts 3, .each having a pulley 4- journaled thereon for vreceiving the hoisting line or rope 5 which when the device is in use is trained about the pulleys for disposal in bridging relation thereto above and along the longitudinal center of the block.

The block can be attached either to the crossarm or directly to the pole, and in order to attach the block to the crossarm, there is fixed to the under face of the base plate or member 2, upon opposite sides of the transverse center thereof the upper portions 6 of a pair of right angle brackets that have their free portions 'l extending transversely of the under face in depending relation therefrom, and spaced from each other ra proper distance to bear against the side faces -of the crossarm, so that theblock will rest upon the crossarm for attachment thereto and for 'disposal an equal distance upon the opposite sides thereof, as shown in Figure 4.

"extends laterally directed ears 9 and I0 respectively, the arcuate portion being curved to substantially follow the transverse curvature of the pole. The clamp also includes a chain II that has one end connected to an eyebolt I 2 which has ,its shank extending through an opening in the ear Ill and the bolt is secured to that ear by a nut I3 provided with a crank handle I4. VA spacing collar I5 is disposed between the ear IIJ and the nut and the latter is formed with a beveled inner face mounted in a socket in the collar. The opposite end portion of the chain has adjustable connection with the ear 9 andl for that purpose, the latter ear is provided with a notch I6 for receiving any one of the links of said end portion, with the result it will be seen that the clamp can be readily adjusted to t poles of various diameters and is disposed in surrounding and binding engagement therewith. In order to prevent any possibility of displacement of the clamp relative to the pole, the clamp is provided with a pole penetrating pin I1 fixed -to the arcuate portion of the saddle plate midway the ends there- 3 of, and is adapted to be driven into the pole, as shown in Figure 2.

The clamp is connected to the block by a bracket which includes a pair of arms I8 and I9 respectively, the arms having their upper ends riveted or otherwise permanently xed to the arcuate portion for disposal in depending relation therefrom, while the lower ends of the arms are detachably secured to the block by bolt and nu-t connections 20. The arm I8 is of greater width than that of the arm I9 and hasits upper end curved to follow the curvature'of the arcuate portion, as well as is arranged on theinner face of Y the arcuate portion to bear against .the pole. The arm I8 is secured to the outer face of the inner 'side member of theV block, while the arm I9- which is of angle formation is secured tothe outer face of the outer side member, as shown in Figure 3. VIt will ofcoursebe understood that the `pole clamping structure .isnot used when the device is attachedtothe crossarm as shown in Figure 4, but whether the device is attached as shown in that ligure or as in Figures 1 and 2, the manner of hoisting the transformer may be the same, and in practice it has vbeen found desirable that the device be attached relative to the pole with the rope 5 trained about the pulleys. One end of the rope is then secured to the transforme;` by any suitable means, Yand the rope is trained about a snatch block fixed to the pole at the ground end thereof. The opposite end of the rope is then preferably connected to a truck or other vehicle for use in hoisting the transformer and forholding the same during the process of attaching it tothe pole. t

It is thought from the foregoing .description that, the advantages and novel features of the invention willbe readily apparent. Y

It is to be Vunderstood that changes mayv be made in the construction and in the combination and arrangement of the several parts, provided that such changes fall Within the scope of the appended claims. Y t .Y y `This applicationis a substitute for abandoned application, Serial No. 432,361, filed February 2'5, 1942.

What I 'claim is: 1. A hoisting device for use on line poles, comprising an elongated relatively narrow pulley block, pulleys journaled at the ends of the block, a hoisting rope trained about the pulleys for disposal lin bridging relation thereto, clamping means for disposal in surrounding relation to the pole, said clamping means including Ya saddle plate, said plate having an arcuate portion to follow the curvature of the pole, a pole penetrat-V ing pin fixed to the arcuate portion, an eyebolt being notched, a handled nut on the shank, a

spacing collar between the nut and the plate, a chain connected to the eyebolt and receivable in the notch for adjustment of the clamping means to nt poles of various diameters, and a bracket secured to and`.depending from the arcuate portion and having its lower end detachably secured to the block. l y t 2, In a hoisting device, a bodyhaving a pair of nat longitudinally elongated side members, a base member fixed to the lower edges of the side members to connect the'same in transversely spaced parallel arrangement, the said base member terminating short of the ends of the side members, a pulley journaled on the side members at each end outwardly of the base member, a hoistingropertrained over the pulleys, a pair of angle brackets secured in longitudinally spaced relation to the base member and depending therefrom, and a screw element threadedly mounted `in one ofthe` said brackets forV detachably fastenmember Yfined tothe lower edges of the side members to connect kthe samein transversely spaced parallel arrangement, thrsaid base member terminating short of the ends 'of the side members, a pulley journaled onthe side members at each end outwadlybfthe base member, a hoisting rope `trained over thepulleys, av pair of complementary armssecui'ed to the center portions of the side membersan" eiitending upwardly therefrom at right anls tothe side Hmembersa clamping plate having an intermediate arcuate portionA connectedtothe upper ends of the arms, an eyebolt having. shankextendingthrough one end portion of thev clamping plate, the opposite end `of the vGlaILliiing `plate having af notch therein, and a ,chain .iconn'eciedto .the eyebolt and engage'able with the notch in theclamping plate for clampingY the device about 'a power line Dole. Y VHARVEY C. M/O'I'I.

RF'EREES emi) The V'follvi'ling' references are of record in the file of this patent: u Y

' UNITED STATES PATENTS Number t, lNenne Date l 83,740 sttsn Nov. 3, 1868 523,364 Miller July 24, 1894 567,800 Sept. 15, 1896 807,164 o 926,925 1,256,688 1913 1,333,097 1920 1,423,292 1922 1,501,096 Y 1924 1,754,873 1930 2,252,514 1941 

